Attachment for well-rigging machines



Dec. 11,1923. 1,476,899

H.J.LOCKHART ATTACHMENT FOR WELL RIGGING MACHINES Filed Aug. 5, 1922 3 Sheets-Sheet 1 Que awn Dec. 11, 1923. T T

H. J. LOCKHART ATTACHMENT FOR WELL ameme MACHINES 5 Sheets-Sheet 2 Filed Aug. 5, 1922 Dec. 11,1923. 1 1,476,899.

- H. J. LOCKHART ATTACHMENT FOR WELL RIGGING MACHINES 19 22 3 Sheets-Sheet 3 gwomtov Patented Dec. 11, 1923.

UNITED STATES PATENT OFFICE.

HAROLD JAMES IJOCKHART, -01? PARKERSBURG, VEST VIRGINIA, ASSIGNOR TO THE PARKERSBURG RIG & REEL COMPANY, OF PARKERSBURG, WEST VIRGINIA, A COR- PORATION OF WEST VIRGINIA.

ATTACHMENT FOR WELL-RIGGING- MAGHINES.

Application filed August 3, 1922. Serial No. 579,464.

To all whom it may concern Be it known that I, HAROLD J. LooKHAR'r, a citizen of the United States, residing at Parkersburg, in the county of d and 6 State of West Virginia, have invented certain new and useful Improvements in Attachments for VVell-Rigging Machines, of which the following is a specification.

This invention relates to attachments for well rigging machines, and more particularly to bailing attachments.

An object of the invention is the provision of a portable bailing machine which may be used with either a standard or a rotary rig and which will materially reduce the time consumed in bailing.

A further object is the provision of a bailer operated by a friction clutch, giving flexibility of action.

By means of the construction of this character, a bailer can be picked up in a hole clogged with mud and sand and powerful force exerted in lifting, but if the bailer should suddenly become caught, the clutch will slip before damage to any part of the machinery can take place.

A further object is the provision of a bailer having a substantially positive drive thus eliminating contact and slippage with the band wheel which requires the operator to exert a constant pressure during the hoisting operation to preserve the contact between the band wheel and the bailer shaft. By providing the substantially positive drive the life of the band wheel as well as the belting used thereon is materially increased.

A further object is the provision of a bailing machine which may be rigged up for bailing in materially less time than the time now consumed in this operation.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing:

Figure 1 is a front elevation of a rotary rig showing the bailing attachment in position,

Figure 2 is a horizontal sectional view taken above the platform of the rig, and,

Figure 3 is an enlarged elevation showing the bailing attachment in position.

Referring to the drawings, the reference numeral 1 designates a platform on which top of the derrick and suitable guide pulleys 7 are mounted on this platform. The apparatus is driven from a suitable source of power 8, which may be an internal combustion engine having a main shaft 9. This shaft is connected to a transmission shaft 10 by means of a sprocket chain 11, passing over sprockets 12 and 13 on the two shafts. The rig is provided with the usual drum 1 1, driven by a chain 15, passing over a sprocket on the transmission shaft and a sprocket 16 on a drum shaft 17. A cable 18 is wound about this drum and is carried upwardly over the guide pulleys 7 at the top of the derrick. This cable is provided with a traveling block 19 to which the drilling tools and other apparatus are adapted to be secured.

The attachment forming the subject matter of the present invention consists of a suitable base or foundation 20 which may be provided with runners 21 to permit easy movement from one point to another. The base is provided with end members 22 carryrying bearings 23, adapted to receive a shaft 24. This shaft is provided with a drum 25, adapted to receive the bailing line. The bailing attachment is arranged on the derrick platform between the hoisting drum and the table, as shown, and is secured in place by suitable clamps 26. As shown, the bailer is provided with a friction clutch consisting of a fixed element 27, secured to the shaft 24.- in any suitable manner and a loosely mounted element 28 revolving freely on the shaft. The loosely mounted element 28 is provided with a sprocket wheel 29 adapted to receivea chain 30, passing over a second sprocket wheel 31 on the main shaft. A brake band 32 is arranged about the periphery of the fixed element of the clutch. The brake band and clutch are controlled by suitable levers.

A bailing line 3 1 is spooled on the bailing drum and a bailer attached to the loose en of the line. When the rig is employed for bailing, a single sheave snatch block 35 is secured to the traveling block 19 and the bailing line placed in the groove of the snatch block sheave.-

The method of operation is as follows:

The bailing machine is placed on the plat form in the position shown and securely fastened by clamps 26. Sprockets 29 and 31 are then connected by means of chain 30 todrive the bailing machine. The bailing line is spooled on the bailing drum and a bailer fastened to the loose end. The hoisting lines 18 are then lowered to bring the traveling block 19 to the derrick floor and block 35 is then attached to the traveling block. The bailing line is placed in the groove of block 35 and the hoisting drum operated to raise the traveling block to any desired height. A position adjacent the top of the derrick is advantageous as this permits the use of bailers up to sixty feet in length. The hoisting drum is then locked in position and the bailing machine is then ready for operation. To remove the bailing attachment, the reverse operation is carried out, the traveling block being lowered to the derrick floor to release the block 35.

When the ordinary hoisting drum of a rotary rig is employed for bailing, it is necessaryto spool practically all of the hoisting line on the drum, and send a man to the platform at the top of the derrick to attach the bailer. This operation consumes a large amount of time which can be materially re duced by the use of the present attachment. It is also possible to obtain greater speed of operation when the present machine is used, as will be apparent from an inspection of the drive mechanism shown in Figure 3 of the drawings. The hoisting drum mustnecessarily be driven at aslow rate of speed to furnish the large amount of power necessary in various well digging operations, whereas the bailing machine may be driven at a high rate of speed due to the relatively small amount oi? power employed in bailing.

it is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example ot the same, and. that various changes in the shape. s ze, and arrangement of parts may be re sorted to without departing irom the spirit of the invention or the scope oi the sub joined claims.

Having thus described my invention, I claim:

1. The combination with a well rig having a hoisting drum, :1 hoisting line and a traveling block a portable bailing machine comprising a drum adapted to be arranged on the platform of the rig, a bailing line spooled about said drum, a pulley block adapted to be carried by said traveling block, said bailing line being passed over said pulley block, and means for rotating said drum.

2. In combination with a well rig having a hoisting drum, :1 hoisting line and a traveling block, of a portable bailing machine comprising a base adapted to be secured to the platform of the rig, a revolving drum mounted on said base, a bailing line carried by said drum, 2 block secured to said traveling block and having a pulley over which said bailing line is adapted to pass, and means for operating said drum.

In testimony whereof I afiix my signature i presence of two witnesses.

HAROLD JAMES LOCKHART. Witnesses:

M. O. MrroHnL,

H. F. OWENS. 

